- Apr 21, 2005
The gear, as LITP posted, is PN 33403-69055. I got it from MegaZip or PartSouq (shipped from Japan). It came with all the little goodies pictured in the bag. Since I didn't have the correct drive gear per the thread above, a correct used drive gear was purchased from SOR, their part number 070-31A-U. Couldn't find a new one, and the SOR price was reasonable. Both parts installed fine in my 1974 solid case. I've clocked about 2k miles on this setup.
With the above 2 parts, I'm 5% under on my 33x10.5 BFG KO2 ATs. So 50 mph on my speedo is 52 mph on my GPS. In fact, "adding 2 mph" works well for all the speeds I drive since its a narrow band on these things. I also verified the 5% under on the odometer over a 30 mile drive. When doing the math for MPG, I add 5% to my odometer mileage to get a more accurate result. Different tires will obviously have different results.
I looked on a parts site that shows the actual part numbers. Shows 3/69-12/78 one part number using a 18 teeth driven gear and a 1/79-7/80 another part number using 16 teeth driven gear. My 79 unfortunately has a 74 transfer case. My guess because the piece together a shift linkage instead of changing the high/low shift so it pointed forward they didn't bother switching the drive and driven gear. The 79/80 part number is 33481-60030 and NLA. Because this one showed being used for 16 teeth would probably be the best fit for 15 teeth driven gear on the split case. SOR shows this drive gear good for 58-80. First few years of the FJ40 it used a different case. Toyota also offered higher gearing than 3:70:1 the first couple years. Know of a case where someone switched a offset diff rear axle for the centered their 62 had. First time went in 4WD the front was trying drag the back. Would have to dig out an old micro-fiche but guessing had more than one part available in the those years.